Merge branch '3.4'

* 3.4: (38 commits)
  Fix merge
  [Lock] Expose an expiringDate and isExpired method in Lock
  [VarDumper] fix DateCasterTest
  [config] Add ability to deprecate a node
  feature #22382 [config] Add abbitily to deprecate a node (Nyholm, fabpot, sanpii)
  Fix segfault in period caster
  Create an interface for TranslationReader and moved TranslationLoader to Translation component
  Always require symfony/polyfill-apcu to provide APCuIterator everywhere
  [Lock] Fix some tests that require pcntl_sigwaitinfo() function
  bumped Symfony version to 3.3.9
  updated VERSION for 3.3.8
  updated CHANGELOG for 3.3.8
  [DI] Fix tracking env var placeholders nested in object graphs
  bumped Symfony version to 3.3.8
  updated VERSION for 3.3.7
  updated CHANGELOG for 3.3.7
  Add period caster
  [DI] improve psr4-based service discovery with namespace option
  [DI] Fix tracking env vars when merging configs (bis)
  removed obsolete comment
  ...

Author: Robin Chalas

NumberFormatter/NumberFormatter.php

@@ -357,9 +357,9 @@ public function formatCurrency($value, $currency)
     /**
      * Format a number.
      *
-     * @param number $value The value to format
-     * @param int    $type  Type of the formatting, one of the format type constants
-     *                      Only type NumberFormatter::TYPE_DEFAULT is currently supported.
+     * @param int|float $value The value to format
+     * @param int       $type  Type of the formatting, one of the format type constants
+     *                         Only type NumberFormatter::TYPE_DEFAULT is currently supported.
      *
      * @return bool|string The formatted value or false on error
      *